Winters in Potomac are cold and variable, with temperatures often dropping below freezing and averaging around 2°C. Spring brings gradual warming, with March marking a significant increase in temperatures, reaching averages of 9°C. Summer months are mild to warm, with July being the hottest month, but still relatively cool compared to other parts of the country. Autumn is similar to spring, with temperatures gradually cooling down, and October experiencing a slight drop before November's chill sets in. The coldest periods occur from December to February, while June and August have the highest average temperatures.